Machine



c. ROBERTS.

TEXTILE AND LIKE PRINTING MACHINE.

APPLICATION FILED MAY I9, 1920. 1,378,278, Patented May 17, 1921.

3 SHEETSSHEET .l

c. ROBERTSI TEXTIL'E ANDYLIKE PRINTING MACHINE.

I APPLICATION FILED MAY 19, 1920. I

1,378,278. Patntd May 17, 1921.

3 SHEETS-SHEET 2.

c. ROBERTS.

TEXTIL.E AND LIKE PRINTING MACHINE. APPLICATION FILED MAY 15 1920.

1,378,278. Patented May 17,1921,

3 SHEETSSHEET 3.

UNITED srrss T FEICE.

CHARLES ROBERTS, OF MANCHESTER, ENGLAND, ASSIGNOR TO THE CALICO PRINTERS ASSOCIATTON LIll/IITED, 0F MANCHESTER, ENGLAND.

TEXTILE AND LIKE PRINTING MACHINE.

Specification of Letters Patent.

Patented May 17, 1921.

Application filed May 19, 1920. Serial No. 382,593.

To all whom it may concern:

Be it known that 1, CHARLES Ronnn'rs, a subject of the King of Great Britain and Ireland, and resident of St. Jamess Buildings, Oxford street, Manchester, England, have invented certain new and useful Tmprovements Relating to Textile and like Printing Machines, of which the following is a specification.

This invention relates to machines employed in the printing of textile and like fabrics or materials and more particularly to the means for cleaning the proof covered printing bowls of such machines.

Heretofore various forms of cleaning devices have been employed which have comprised squeegees, doctors, brushes, scrapers and the like, but the object of my invention is to provide an improved combination and arrangement of parts which shall be readily applied and very effective in action.

My invention comprises the improved combination and arrangement of parts hereinafter described and claimed.

Referring to the accompanying explanatory drawings Figure 1 is an elevation with the cleaning device in section, showing the application of my invention for the cleaning of a proof covered printing bowl.

Fig. 2 is an end view of Fig. 1.

Fig. 3 is a sectional view of the cleaning device drawn to an enlarged-scale.

Figs. 4 and 5 are detail views to be here inafter referred to.

The same reference letters in the different views indicate the same or similar parts.

The proof covered printing bowl a which is to have its surface scraped or brushed, washed and thoroughly cleansed of all the color which penetrates thereto and adheres thereon during the printing operation has a cleaning device brought thereover which extends from side to side of the bowl as shown in Fig. 2, and comprises a casing Z) divided into two main chambers or compartments 0, d by a division wall 6 which has an extension piece 7 at its lower end towhich the scraping or brushing means may be secured. As shown in Fig. 4, which is a plan view of the active face of the part 7, the latter is provided with a number of ribs 9 which press upon the rubber covering of the bowl and exert an effective scraping action thereon. In the modification shown in Fig. 5, the face of the part f is provided wlth a brush it for cleaning the surface of the roller.

Liquid is supplied to the compartment 0 by the pipe it and as the bowl a rotates in the direction of the arrow such liquid issuing from 0 by the narrow passage 2', is carried toward the scrapers or brush on 7 and so acts in conjunction with the scrapers to lnsure an effective cleansing of the bowl surface.

The dirty liquid and any solid matter removed from the bowl a by the scraper or brush travels forward to the slot j in the cleaner, the said slot communicating with the compartment d which is placed under a vacuum or reduced pressure by means of pipes k which may lead to a suitable vacuum pump or exhauster.

A plate wt (preferably made of a nickel or other non-corroding alloy) carried by the cleaning device bears upon the bowl. The said plate forms a portion of the suction channel to the surface of the bowl and insures that the suction action is effectively concentrated for the drawing of the liquid from the scraper into the compartment 03 and that direct entry of air to the said compartment is prevented.

I find, however, that in order to insure the effective drying and clearing of the bowl surface that a further or supplementary compartment or cavity a beyond the plate on and in communication with the suction chamber (Z by passages 0 is very advantageous, the said compartment working in conjunction with a resilient doctor 19 preferably made of india-rubber and fed forward by the screw g so that it is pressed into engagement with the surface of the bowl.

If desired, I may provide a grinding or like roller 1' beyond the cleaning device for leveling or truing the surface of the bowl a after it has been cleansed.

I do not limit myself to the use of any particular liquid in the compartment 0 but may vary the same to suit the character of the color or the like to be removed from the bowl a.

Having now described my invention what I claim as new and desire to secure by Letters Patent is 1. Means for cleansing the surface of proof covered bowls in printing machines, 110

consisting of the combination with a casing having a compartment therein formed by a longitudinal division piece with an extension, of a scraping device upon said extension engaging the bowl, means supplying liquid to said compartment, an outlet passage for the liquid extending across the compartment adjacent the bowl surface and in advance of the scraping device, a plate upon said casing engaging the bowl surface, a further compartment in said casing, means placing said compartment under vacuum, a communicating passage between said vacuum compartment and the surface of the bowl in part formed by said plate and at the rear side of the scraping device, a supplementary vacuum compartment or cavity at the rear side of said plate and a doctor engaging the bowl at the rear side of said compartment, as set forth.

2. Means for cleansing the surface of the proof covered bowls in printing machines consisting of the combination with a casing having a compartment therein formed by a longitudinal division piece with an extension, of a scraping device upon said extension engaging the bowl, means supplying liquid to said compartment, an outlet passage for the liquid extending across the compartment adjacent the bowl surface and in advance of the scraping device. a plate upon said casing engaging the bowl surface, a further compartment in said casing, means placing said compartment under vacuum, a communicating passage between said vac uum compartment and the surface of the bowl in part formed by said plate and at the rear side of the scraping device, a supplementary vacuum compartment or cavity at the rear side of said plate, a resilient plate engaging the bowl at the rear side of said supplementary vacuum compartment, and means establishing communication between said vacuum and supplementary vacuum compartments, as set forth.

In testimony whereof I have signed my name to this specification.

CHARLES ROBERTS. 

